It is recommended to take Surface Oral Suspension one hour before meals preferably at bedtime The dosage and duration should be followed as advised by the doctor It is important to continue taking the medication for the full duration recommended by the doctor If treatment is stopped too early symptoms may return and the condition may worsen Make sure to inform your doctor about any other medications you are taking as some may interact with or be affected by this medicine The most common side effects of this medicine are constipation To avoid these side effects it is advised to drink plenty of fluids while taking the medication Dizziness and sleepiness may also occur so it is important not to drive or engage in activities that require mental focus until you know how this medicine affects you If you have any liver or kidney disease it is important to inform your doctor before taking this medicine as the dosage may need to be adjusted It is not recommended to take this medicine with an antacid If you need to take an antacid it is best to wait two hours before or after taking this medicine